Rename is_preview_disabled

Signed-off-by: Jitendra Gundaniya <[email protected]>

package/kedro_viz/models/flowchart.py

@@ -645,10 +645,10 @@ def get_preview_args(self):
         """Gets the preview arguments for a dataset"""
         return self.viz_metadata.get("preview_args", None)
 
-    def is_preview_disabled(self):
-        """Checks if the dataset has a preview disabled"""
+    def is_preview_enabled(self):
+        """Checks if the dataset has a preview enabled at the node level."""
         return (
-            self.viz_metadata is not None and self.viz_metadata.get("preview") is False
+            self.viz_metadata is None or self.viz_metadata.get("preview") is not False
         )
 
 
@@ -806,7 +806,9 @@ def set_run_command(cls, _):
     @field_validator("preview")
     @classmethod
     def set_preview(cls, _):
-        if cls.data_node.is_preview_disabled() or not hasattr(cls.dataset, "preview"):
+        if not cls.data_node.is_preview_enabled() or not hasattr(
+            cls.dataset, "preview"
+        ):
             return None
 
         try:
@@ -829,7 +831,9 @@ def set_preview(cls, _):
     @field_validator("preview_type")
     @classmethod
     def set_preview_type(cls, _):
-        if cls.data_node.is_preview_disabled() or not hasattr(cls.dataset, "preview"):
+        if not cls.data_node.is_preview_enabled() or not hasattr(
+            cls.dataset, "preview"
+        ):
             return None
 
         try:

package/tests/test_models/test_flowchart.py

@@ -386,13 +386,13 @@ def test_get_preview_args(self):
         )
         assert data_node.get_preview_args() == {"nrows": 3}
 
-    def test_is_preview_disabled(self):
+    def test_is_preview_enabled(self):
         metadata = {"kedro-viz": {"preview": False}}
         dataset = CSVDataset(filepath="test.csv", metadata=metadata)
         data_node = GraphNode.create_data_node(
             dataset_name="dataset", tags=set(), layer=None, dataset=dataset, stats=None
         )
-        assert data_node.is_preview_disabled() is True
+        assert data_node.is_preview_enabled() is False
 
     def test_preview_data_node_metadata(self, example_data_node):
         expected_preview_data = {